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   7575篇
  免费   691篇
  国内免费   13篇
耳鼻咽喉   62篇
儿科学   223篇
妇产科学   127篇
基础医学   1115篇
口腔科学   138篇
临床医学   888篇
内科学   1568篇
皮肤病学   341篇
神经病学   628篇
特种医学   284篇
外国民族医学   2篇
外科学   824篇
综合类   94篇
一般理论   13篇
预防医学   768篇
眼科学   195篇
药学   603篇
中国医学   11篇
肿瘤学   395篇
  2022年   54篇
  2021年   135篇
  2020年   96篇
  2019年   114篇
  2018年   155篇
  2017年   118篇
  2016年   124篇
  2015年   134篇
  2014年   159篇
  2013年   267篇
  2012年   338篇
  2011年   360篇
  2010年   207篇
  2009年   182篇
  2008年   327篇
  2007年   372篇
  2006年   330篇
  2005年   351篇
  2004年   362篇
  2003年   317篇
  2002年   306篇
  2001年   264篇
  2000年   286篇
  1999年   219篇
  1998年   116篇
  1997年   80篇
  1996年   82篇
  1995年   69篇
  1994年   61篇
  1993年   48篇
  1992年   181篇
  1991年   162篇
  1990年   167篇
  1989年   171篇
  1988年   147篇
  1987年   135篇
  1986年   128篇
  1985年   106篇
  1984年   93篇
  1983年   68篇
  1982年   53篇
  1981年   51篇
  1979年   73篇
  1978年   60篇
  1977年   61篇
  1976年   46篇
  1975年   53篇
  1974年   42篇
  1973年   54篇
  1972年   41篇
排序方式: 共有8279条查询结果,搜索用时 15 毫秒
1.
2.
The MMPI was administered during the patient-perceived best time of the menstrual cycle and during the patient-perceived worst time of the cycle in order to examine the stability of MMPI profile configurations. Subjects were 214 women who were referred to two metropolitan outpatient premenstrual syndrome (PMS) clinics for moderate to severe premenstrual complaints. This sample was selected from 1,849 intake files after screening by strict selection criteria for PMS. The results indicate that there are wide fluctuations in profile patterns between the best and worst times of the menstrual cycle for a large number of patients. Caution in using the MMPI is strongly advised.  相似文献   
3.
4.
5.
The consequences of alcoholism on the mental health of spouses of lifetime at-risk drinkers are only known from studies on alcoholics already in treatment. A retrospective analysis was conducted using data from a Quebec community health survey. The purpose of this study was twofold. First, our goal was to ascertain the mental health of female spouses living with a male lifetime at-risk drinker. Secondly, we wanted to examine the relationship between male lifetime at-risk drinkers (aged 30-54 years) and the psychological distress of their nondrinking female spouses. Lifetime at-risk drinking, for the purposes of this study, was defined as having at least two positive answers to the CAGE questionnaire. Couples wherein both spouses were deemed not at-risk for problem drinking by the CAGE instrument (0 or 1 positive answer) formed the control group. Psychological distress was measured using the Indice de Détresse Psychologique de l'Enquête Santé Québec (Préville, M., Boyer, R., Potvin, L., Perreault, C., & Légaré, G. (1992). La détresse psychologique: détermination de la fiabilité et de la validité de la mesure utilisée dans l'enquête Santé Québec. Cahier de recherches #7, Montréal, Santé Québec.). It measures symptoms of anxiety, depression, aggressivity, and cognitive impairments. Scores of >or=22 (out of 100) were indicative of a high level of psychological distress. This study confirmed higher levels of psychological distress in female spouses of male lifetime at-risk drinkers in the general population. An exploratory study examined the association between the psychological distress of female spouses and each of the following nine independent variables: male partner lifetime at-risk drinker, stressful life events, job situation, socioeconomic status, perceived health status, presence of children less than 15 years, length of the marital relationship, presence of a confidant, and availability of social support. Lifetime at-risk drinking is a risk factor for the spouse's psychological distress. An examination of the demographic characteristics related to alcohol intake in male lifetime at-risk drinkers is also described in this study.  相似文献   
6.
7.
8.
BACKGROUND: There is no consensus regarding the optimal rate of follow-up in the post-bariatric surgery patient population. METHODS: The records of all patients who underwent laparoscopic Roux-en-Y gastric bypass from 2001 to 2003 were reviewed. Using patient zip codes, travel distances were calculated between the patients' places of residence and our clinic. Patients were then assigned to 1 of 3 cohorts according to the following distances: (1) < 50 miles, (2) 50 to 100 miles, and (3) > 100 miles. Patient compliance with follow-up appointments at 3 weeks, 3 months, 6 months, 9 months, and 12 months was analyzed. Linear trends were identified using the Mantel-Haenszel test. Age and sex were analyzed as possible predictors of compliance using the chi(2) test. P values < .05 were considered statistically significant. RESULTS: The study group comprised 150 patients (127 females and 23 males). The 3 cohorts contained 115, 21, and 14 patients, respectively. All patients in each cohort were compliant with the 3-week follow-up appointment. Although there were differences in compliance between cohorts at each of the remaining appointments, only the 9-month (70.3% vs 61.9% vs 35.7%) visit showed statistical significance (P = .035). The 6-month visit trended toward significance (85.2% vs 76.2% vs 64.3%; P = .088). Males were more likely to be compliant with the 12-month follow-up (P = .040). When controlling for sex, travel distance was also a predictor of compliance at this follow-up visit (P = .024). Age was not predictive of compliance (P = .827). CONCLUSION: Based on our findings, we conclude that travel distance from the clinic does not significantly affect compliance at the initial follow-up, 3-month, and 12-month appointments. However, distance does tend to affect compliance at the 6-month appointment and significantly affects compliance at the 9-month appointment. Males are more likely to be compliant at the 12 month follow-up visit. We must continue to strive for 100% follow-up in our post-bariatric surgery patients.  相似文献   
9.
Two models of hot water washer disinfectors (Decomat 128 and Hospital A, Euroclean Canada Inc; Ontario, Canada) were evaluated by two methods for their efficacy in disinfecting anesthesia equipment. In the first method, three different microbial suspensions were each sealed into 30 capillary tubes. In the second method, corrugated anesthesia tubes were rinsed with suspensions of each of two bacterial strains. The tubes then underwent a standard cycle in the hot water washer disinfectors and were subsequently tested for growth of microorganisms. All experiments were repeated three times, and the temperature was registered in all cases. In the capillary test, growth was rarely detected (13/540 tubes) and the inactivation factor for both apparatus was greater than 5 log10. In the rinse test, no growth was detected. The mean temperature for 15 disinfection cycles was 84.2 +/- 0.8 degrees C for Decomat 128 and 88.9 +/- 0.5 degrees C for Hospital A. However, for Decomat 128 we observed a variation of 3 degrees C from one disinfection cycle to another and a progressive reduction of 2.2 degrees C over a series of five consecutive complete cycles. Both methods gave reproducible results. Under our experimental conditions, both hot water washer disinfectors proved to be efficacious for the disinfection of reusable anesthesia equipment.  相似文献   
10.
In this investigation is demonstrated that the nurse needs, in order to carry out a successful work, to learn about the composition of the population of the area under her care. In Patana, a Maisí municipality with 165 inhabitants, 93 male and 72 females, prevailing ninth grade school level and an initial low hygienic culture level, which is considered as regular at the present time, intestinal parasitism and malnutrition are the main diseases in the zone. It is well demonstrated that there is a wide relationship between hygienic conditions at home and community and the incidence of the fore-mentioned diseases and that the educational work performed by the nurse in the area under her care exerts a positive influence, but the support of grassroot mass organizations is required.  相似文献   
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