全文获取类型
收费全文 | 4613篇 |
免费 | 596篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 26篇 |
儿科学 | 149篇 |
妇产科学 | 217篇 |
基础医学 | 439篇 |
口腔科学 | 106篇 |
临床医学 | 1299篇 |
内科学 | 820篇 |
皮肤病学 | 33篇 |
神经病学 | 217篇 |
特种医学 | 105篇 |
外科学 | 352篇 |
综合类 | 236篇 |
一般理论 | 1篇 |
预防医学 | 582篇 |
眼科学 | 109篇 |
药学 | 312篇 |
中国医学 | 53篇 |
肿瘤学 | 171篇 |
出版年
2024年 | 15篇 |
2023年 | 99篇 |
2022年 | 139篇 |
2021年 | 245篇 |
2020年 | 129篇 |
2019年 | 143篇 |
2018年 | 224篇 |
2017年 | 213篇 |
2016年 | 191篇 |
2015年 | 197篇 |
2014年 | 224篇 |
2013年 | 242篇 |
2012年 | 286篇 |
2011年 | 287篇 |
2010年 | 167篇 |
2009年 | 157篇 |
2008年 | 219篇 |
2007年 | 195篇 |
2006年 | 184篇 |
2005年 | 154篇 |
2004年 | 129篇 |
2003年 | 116篇 |
2002年 | 100篇 |
2001年 | 105篇 |
2000年 | 78篇 |
1999年 | 93篇 |
1998年 | 61篇 |
1997年 | 81篇 |
1996年 | 67篇 |
1995年 | 68篇 |
1994年 | 54篇 |
1993年 | 42篇 |
1992年 | 56篇 |
1991年 | 45篇 |
1990年 | 53篇 |
1989年 | 39篇 |
1988年 | 35篇 |
1987年 | 31篇 |
1986年 | 22篇 |
1985年 | 25篇 |
1984年 | 23篇 |
1983年 | 21篇 |
1982年 | 14篇 |
1981年 | 13篇 |
1980年 | 15篇 |
1979年 | 11篇 |
1978年 | 11篇 |
1977年 | 11篇 |
1976年 | 16篇 |
1975年 | 20篇 |
排序方式: 共有5227条查询结果,搜索用时 15 毫秒
1.
2.
Emma J. Walker Noni E. MacDonald Nehal Islam Nicole Le Saux Karina A. Top Deshayne B. Fell 《Vaccine》2019,37(13):1725-1735
Objective
To systematically review literature on uptake and timeliness of diphtheria-tetanus-pertussis, measles-mumps-rubella, and/or polio-containing vaccines in infants who were born preterm, with a low birth weight, and/or with chronic health conditions that were diagnosed within the first 6?months of life.Methods
Using a standardized search strategy developed by a medical librarian, records were extracted from MEDLINE, Embase, Database of Abstracts of Reviews of Effects, and CINAHL up to May 8, 2018.Results
Out of the 1997 records that were screened, we identified 21 studies that met inclusion criteria. Eleven studies assessed vaccine coverage and/or timeliness in preterm infants, 6 in low birth weight infants, and 7 in children with chronic health conditions. Estimates of coverage in these populations were highly variable, ranging from 40% to 100% across the vaccines and population groups.Conclusions
There is a lack of studies reporting coverage and timeliness of routine immunizations in special populations of children.Policy implications
Our review suggests a need for improved surveillance of immunization status in special populations of infants, as well as a need for standardization of reporting practices. 相似文献3.
4.
5.
Fluid role boundaries: exploring the contribution of the advanced nurse practitioner to multi‐professional palliative care 下载免费PDF全文
6.
7.
MR compatibility of Guglielmi detachable coils 总被引:6,自引:0,他引:6
8.
BEVERLY HAVENS RN MN MPH INGRID SWENSON RN DPH 《Journal of obstetric, gynecologic, and neonatal nursing : JOGNN / NAACOG》1986,15(5):406-411
Seventy-four 8th- and 10th-grade students attending a private girls' school in Hawaii were queried about their perceptions of and preparation for menstruation using a questionnaire administered in a health education class. Eighty percent had already started menstruating. The most frequently cited perceptions by the respondents referred to both the inconveniences and the normalcy of menstruation. Many were first informed about menstruation by their mothers and stated that they also first informed their mothers when they started menstruating. Surprise, fear, and embarrassment were common initial reactions, while strong negative or positive emotions were more rare. Only 35% wanted boys and girls together during class discussion, but 89% stated that boys needed to be informed about menstruation. The most frequent reasons cited for noncoed settings were the girls' concern about their comfort in openly discussing menstruation. Thirty-eight percent thought parents should inform other siblings when they started menstruation, although almost half gave specific conditions the parents should consider. The majority thought the fifth to sixth grades were the best times to introduce menstruation content. 相似文献
9.
Mohammed N Islam Indraneel Bhattacharyya Junu Ojha Karen Bober Donald M Cohen James G Green 《Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics》2007,104(4):501-509
Hemifacial hypertrophy (HFH) is rare and characterized by unilateral enlargement of the head and teeth. Hemifacial hypertrophy is classified as true HFH (THFH) with unilateral enlargement of the viscerocranium, and partial HFH (PHFH) in which not all structures are enlarged. We present a case of THFH and compare and contrast it with a case of PHFH. Hemifacial hypertrophy may cover a wide spectrum of defects or may involve only muscle or bone. Myohyperplasia, reported previously as a separate syndrome, may actually represent a forme fruste of PHFH or THFH. The PHFH patient lead a healthy, normal life without significant psychosocial problems and was reluctant to accept his deformity. Contrastingly, the THFH patient had significant social stigma and compromised health together with major aesthetic morbidity. Treatment planning in THFH is arduous and involves multiple modalities. Therefore, it is imperative to differentiate THFH and PHFH for better understanding and management of the condition. 相似文献
10.