首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4570篇
  免费   125篇
  国内免费   3篇
管理学   506篇
民族学   26篇
人口学   400篇
丛书文集   27篇
理论方法论   342篇
综合类   90篇
社会学   2072篇
统计学   1235篇
  2023年   30篇
  2022年   22篇
  2021年   25篇
  2020年   80篇
  2019年   143篇
  2018年   118篇
  2017年   207篇
  2016年   122篇
  2015年   106篇
  2014年   125篇
  2013年   959篇
  2012年   151篇
  2011年   122篇
  2010年   87篇
  2009年   107篇
  2008年   102篇
  2007年   98篇
  2006年   79篇
  2005年   84篇
  2004年   80篇
  2003年   66篇
  2002年   89篇
  2001年   97篇
  2000年   80篇
  1999年   94篇
  1998年   78篇
  1997年   69篇
  1996年   60篇
  1995年   78篇
  1994年   57篇
  1993年   60篇
  1992年   68篇
  1991年   71篇
  1990年   75篇
  1989年   64篇
  1988年   47篇
  1987年   45篇
  1986年   53篇
  1985年   58篇
  1984年   58篇
  1983年   42篇
  1982年   39篇
  1981年   35篇
  1980年   41篇
  1979年   46篇
  1978年   37篇
  1977年   27篇
  1975年   21篇
  1974年   23篇
  1971年   21篇
排序方式: 共有4698条查询结果,搜索用时 15 毫秒
991.
Using a composite index of legal provisions for annual and family leave in western Europe, the United States, Canada, Australia, Japan and the Republic of Korea, the authors rank legislative support for this aspect of work–family balance. The United States ranks last: its employers are not required to grant annual leave and employees can take no more than 12 weeks' family leave per year. The United States' comparatively low labour standards, the authors argue, may be due to the dominance of a market‐based conception of employment and the assumption of equal employer–employee bargaining power, neither of which is fully shared by the other industrialized democracies.  相似文献   
992.
Abstract

College health professionals want to assure the unique healthcare and health education needs of college students will continue to be met under national and state healthcare reform. This may be an “all or nothing” proposition. Either colleges and universities will have exclusive control of healthcare delivery for the college student population or else college health will not be a major force in healthcare reform. If college health is to play a meaningful role in future government-controlled health insurance programs, it must first demonstrate that current health services and insurance financing programs meet minimum quality standards. This proposal calls for expanding existing federal laws to create qualified student health plans and integrating the college health model into a reform package based on employer-sponsored health insurance. The concept of qualified student health plans allows for a high degree of flexibility that can be integrated into the majority of state and federal healthcare reform proposals, including the plan proposed by President Clinton, that are not based on a single-payer system. Ultimately, the authors suggest, their proposed plan would eliminate the current situation, in which large numbers of college students are uninsured or underinsured.  相似文献   
993.
994.
Abstract

“Usefulness of Screening Chest Roentgenograms in Preoperative Patients,” Lloyd Rucker, Elizabeth B. Frye, Myrlene A. Staten. We proposed that clinical criteria could define a group of patients very unlikely to have abnormal preoperative chest roentgenograms. Nine hundred five surgical admissions were screened for the presence of clinical factors we thought would make those patients more likely to have abnormal preoperative chest roentgenograms. Of these, 368 had no risk factors. One patient (0.3%) of the 368 had an abnormal x-ray film, which did not affect the surgery. No material abnormalities were found in the remainder of the group without risk factors. Five hundred four patients had identifiable risk factors. Of these, 114 (22%) were found to have serious abnormalities on preoperative chest roentgenograms. (Journal of the American Medical Association 1983;250:3209–3211)

“Effect of Treatment Regimens for Neisseria Gonorrhoeae on Simultaneous Infection With Chlamydia Trachomatis,” Walter E. Stamm, et al. We evaluated the effect of treatment for gonorrhea on simultaneous Chlamydia trachomatis infection by randomly assigning 293 heterosexual men and 246 heterosexual women with gonorrhea to receive one of the following treatment regimens: (1) 4.8 million units of aqueous procaine penicillin plus 1 g of probenecid, (2) nine tablets of trimethoprim-sulfamethoxazole daily for three days, or (3) 500 mg of tetracycline four times a day for five days. Among the men, gonococcal infection was cured in 99 per cent given penicillin plus probenecid, 96 per cent given trimethoprim-sulfamethoxazole, and 98 per cent given tetracycline. Among the women, only 90 per cent given tetracycline were cured, in contrast to 97 per cent given penicillin plus probenecid and 99 per cent given trimethoprim-sulfamethoxazole.  相似文献   
995.
Abstract

Objective: The objective was to survey community college personnel about student substance use, and infrastructure (staff and funding), programs, and collaborations dedicated to substance use prevention. Participants: The sample included 100 administrators, faculty, and health services staff at 100 community colleges. Methods: Participants completed a Web-based survey. Results: Participants reported a number of alcohol and other drug (AOD) related concerns. Despite limited staff and funding dedicated to AOD, institutions are implementing a number of programs, although many are not implementing some of the programs popular at traditional 4-year colleges. They are also collaborating with a number of on- and off-campus groups. The availability of staff and funding dedicated to AOD, and the presence of residence halls, is associated with health programming and substance abuse collaborations. Conclusions: Results suggest that there is a need for increased research to understand the most effective AOD prevention strategies for community colleges.  相似文献   
996.
Abstract

The responses of 582 male university students attending the UCLA Student Health Service for medical evaluation are presented. Of these students, 37% (215) were freshmen and varsity athletes having pretraining physicals, and 63% (367) were students being evaluated in the SHS primary care clinics. A self-report questionnaire examined the frequency of sexual problems experienced by the respondents and their partners. The most common concerns expressed about themselves were orgasmic difficulties, feeling too interested in sex, and trouble getting and keeping erections. Forty-one percent of the SHS group and 33% of the athletes group had sexual concerns, and, of these, 55% and 40% respectively wanted help with their problems. Specific counseling needs of students were also evaluated.  相似文献   
997.
Using a feminist postmodern perspective and the sensitizing concept of split loyalties from Contextual Theory, the primary purpose of this qualitative study was to develop a better understanding of how adult female adoptees from closed adoptions negotiate relationships with their adoptive and biological mothers post‐reunion. We conducted semi‐structured individual interviews with nine adult female adoptees, ages 28–52, who were adopted prior to the age of two. Six were Caucasian, three were African American, and the average age at reunion was 29. Grounded theory techniques were used to code the qualitative data, in particular the constant comparative method of analysis. Four main categories emerged: (a) Negotiating Mother–Daughter Relationships, (b) Relating to Mothers Equitably, (c) Loyalty, and (d) Adoptees’ Emotional Needs. Our findings suggest the adoptive mother–daughter relationship has a salient effect on adoptees’ relationships with biological mothers post‐reunion. Loyalty to the adoptive mother seems to influence the evolving relationship and closeness displayed toward the birth mother. Adult female adoptees from closed adoptions described struggling with managing their two mother–daughter relationships and need clinical help addressing their own emotional needs.  相似文献   
998.
Data from the 1911 Census of England and Wales are examined for evidence of family limitation early in marriage. It is shown that a substantial number of couples used birth control for ‘spacing’ as well as for ‘stopping’ fertility. Moreover ‘spacing’ of births appears to have been more widespread in districts in which women's employment opportunities were relatively good. In general, the results obtained do not fit with the Princeton view of the European fertility transition with its stress on parity-specific family limitation spreading in response to improvements in contraceptive information and technology.  相似文献   
999.
Life Tables have been calculated by Kuczynski's method for males and females in Ceylon for 1910–12, 1920–2 and 1945–7. The method is described, and the main results are presented.  相似文献   
1000.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号